<html>
<head>
<title>Service Worker update and interception</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/service-workers/service-worker/resources/test-helpers.sub.js"></script>
</head>
<body>
<script>
var registration;
var iframe;
promise_test(async (test) => {
    registration = await navigator.serviceWorker.getRegistration("resources");
    if (registration)
        await registration.unregister();
    registration = await navigator.serviceWorker.register("update-worker.py", { scope : "resources" });
    activeWorker = registration.active;
    if (activeWorker)
        return;
    activeWorker = registration.installing;
    await new Promise(resolve => {
        activeWorker.addEventListener('statechange', () => {
            if (activeWorker.state === "activated")
                resolve();
        });
    });
}, "Setup worker");

promise_test(async (test) => {
    var promises = [];
    for (var cptr = 0; cptr < 10; cptr++) {
         if (registration.active) {
            registration.update();
            var iframe = await with_iframe("resources/empty.html");
            await iframe.contentWindow.fetch("mouse").then(async (response) => {
                if (await response.text() !== "cat")
                    return Promise.reject("not cat");
            });
            iframe.remove();
        }
    }
    await Promise.all(promises);
}, "Ensure all fetches are intercepted");
</script>
</body>
</html>